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Information storage medium

An information storage and media technology, applied in the field of disk-shaped information storage media, can solve the problem that barcode patterns cannot be recorded, etc.

Inactive Publication Date: 2006-08-02
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem in the next-generation optical disc corresponding to the short wavelength that the barcode pattern cannot be recorded correctly by the long-wavelength laser beam corresponding to the processing of the current optical disc.

Method used

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Embodiment Construction

[0016] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0017] Fig. 1 is an example of the information storage medium of the present invention, showing a schematic view of the structure of the burning area (BCA) of an optical disc (WORM optical disc). Fig. 2 shows a schematic diagram of the flow of the method for manufacturing such an optical disc. Fig. 3 is a graph showing the absorption characteristics of a dye mixture formed by mixing a dye having a predetermined or higher sensitivity to a 650 nm beam with a base dye having a predetermined or higher sensitivity to a 405 nm beam at several mixing ratios .

[0018] When an optical disc OD is to be manufactured, disc unique information or management information is recorded on the disc. The disc unique information is, for example, copy protection information. For example, each disc is identified using this copy protection information.

[0019] On an optical...

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Abstract

An information storage medium as an example of this invention includes a recording layer (1) formed by a dye material having a predetermined sensitivity level or more to both a light beam having a first waveband and a light beam having a second waveband shorter than the first waveband. The recording layer includes a concentric management information area (11), and a concentric data area (21). The management information area includes a plurality of bar-like patterns formed by the light beam having the first waveband, and arranged in a circumferential direction. The plurality of bar-like patterns arranged in the circumferential direction form management information. The data area can record data by the light beam having the second waveband.

Description

technical field [0001] The present invention relates to a disc-shaped information storage medium, such as DVD-R. Background technique [0002] An optical disc, such as a DVD, has an area called a burning area (BCA) for recording a barcode pattern. The barcode pattern is recorded by burning off the reflective film of the disc with laser light, or by changing the phase state of the phase-change recording film of the disc. For example, Japanese Laid-Open Patent Application Publication No. 2004-152429 proposes a technique for recording a barcode pattern on a disc by synchronizing a modulation signal corresponding to the barcode pattern with a signal from a disc rotation motor. [0003] In order to process next-generation optical discs having a higher recording density than current optical discs, a laser beam having a shorter wavelength than that used for processing current optical discs is used. [0004] The recording characteristics of such a dye-using WORM disc depend on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/24G11B7/246G11B7/24035G11B7/24073G11B7/24094G11B7/24097G11B7/2495
CPCG11B2220/2537G11B7/00736G11B7/2495G11B7/246G11B7/2534G11B27/24G11B7/2472G11B7/248G11B2007/24612G11B7/2467G11B7/2407G11B7/241
Inventor 大寺泰章高泽孝次森下直树森田成二中村直正小川昭人
Owner KK TOSHIBA